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| Road Performance Research on Cold Recycled Pavement Base with Foamed Asphalt on the Basis of Fractal Dimension |
| CHEN Long1, HE Zhao-yi1, CHEN Hong-bin2 |
1. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China;
2. Gansu Provincial Transportation Planning, Survey & Design Institute, Co., Ltd., Lanzhou Gansu 730030, China |
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Abstract Nonlinear characteristics of road mineral material and the fractal dimension of grain size distribution, including D (fractal dimension of whole aggregate), Dc (fractal dimension of coarse aggregate) and Df(fractal dimension of fine aggregate) are used as indexes to describe fractal characteristics. Additionally, the formula of fractal gradation theory is put forward, and the correlation with the performance of the mixture is evaluated. Results show that the fine aggregate of 2.36 mm size has a considerable influence on the physical and mechanical properties of cold recycled pavement base mixture with foamed asphalt. The fractal of the continuous-graded aggregate is one dimensional, while the fractal of the gap-graded aggregate is two dimensional. The fractal dimension of the aggregate volume has good applicability as the evaluation index of cold recycled pavement base with foamed asphalt. When the corresponding regression model is established, a strong correlation is also observed between the fractal dimension of the aggregate volume and the indexes of the physical, mechanical, and durable properties of the cold recycled pavement base with foamed asphalt. The fractal dimension of the aggregate volume is an important parameter with rich information content, and fractal is an essential character of the aggregate.
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Received: 04 January 2015
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| Fund:Supported by the Science and Technology Project of Guizhou Provincial Department of Transportation(No.2014-122-015) |
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Corresponding Authors:
CHEN Long,E-mail address:hellolong0701@163.com
E-mail: hellolong0701@163.com
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2016, Vol. 10 
